What is this necklace or pendant?

I found in my parents old jewelry box a pendant which is gold-colored, but probably copper due to the smell. It’s old and it had a built in hold so I assume it’s a pendant. It had Buddha stamped predominately in the middle on one side and the other has a person printed over a deep circle and what I assume is a 13 mostly covering the back. (Could very well be some symbol I am not familiar with. there seems to be writing stamped around the edge, but is worn too much to see. any guesses?